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Comptometer Adding Machines
Comptometer Adding Machines. Research Magazine Advertisements. The Best Resource on the Net of Vintage Ads! (1897) Comptometer Adding Machine. Mistakes in Addition, Office Headache, and mistakes in carrying forward don't occur where this is used. It saves half the time in doing the work and all time looking for errors. Solves with great rapidity and absolute accuracy all arithmetical problems. Felt and Tarrant Mfg. Company. (1908) Comptometer Calculating Machine. The only machine ever invented which will add, multiply and divide by automatic, instantly responsive keys. No lever to operate. The only machine which has been used on all additions, multiplications, and divisions found in bookkeeping. (1899) Comptometer Calculator. Addition, Multiplication and Division are performed at a great saving of time and worry. Used in bookkeeping in the offices of thousands of large firms. Testimonials from Scott and Williams, Builders of Knitting Machinery, Philadelphia and The American Glucose Company, Peoria, Illinois. The comptometer was the first commercially successful key-driven mechanical calculator, patented in the USA by Dorr E. Felt in 1887. Enjoy these vintage ads for Comptometer Adding Machines while you browse through our Advertisement Gallery! As always, more to come from www.magazine-advertisements.com!
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